co-chairs:      S. Okubo (okubo@eri.u-tokyo.ac.jp)
                T. van Dam (tvd@ecgs.lu)

Observations of temporal variations in terrestrial gravity have been essential to investigations regarding tectonic deformations, post-glacial rebound, tides, environmental loading effects, and the structure of the Earth from the inner core to the Earth's crust. Contributions to this special session are solicited which deal with

1. Observations (single station and network results) obtained from absolute and relative gravimeters, intercomparisons of the different instruments, calibrations, and metrology.
2. Geodynamical applications of terrestrial gravity observations including earthquake processes, volcanology, post-glacial rebound, sea level rise, ice-mass change, free oscillations, polar motion, etc.
3. Environmental applications of terrestrial gravity observations including continental water storage variations, non-tidal and tidal ocean loading, and atmospheric effects, monitoring anthropogenic subsidence, etc.
4. What can we learn by combining terrestrial gravity with other observations e.g. airborne gravimetry, InSar, GPS, GRACE and CHAMP.
5. New technologies.
6. Global and regional networks for modeling the time variable gravity field (e.g. the Global Geodynamics Project).